https://hellohasan.com/2017/01/04/%e0%a6%b2%e0%a6%bf%e0%a6%82%e0%a6%95%e0%a6%a1-%e0%a6%b2%e0%a6%bf%e0%a6%b8%e0%a7%8d%e0%a6%9f-linked-list-create-print-size/